diff --git a/docs/DeveloperGuide.adoc b/docs/DeveloperGuide.adoc
index 059b0163bfa..ac579795ab3 100644
--- a/docs/DeveloperGuide.adoc
+++ b/docs/DeveloperGuide.adoc
@@ -312,7 +312,7 @@ a|`JsonImportUtil#importFlashCardsFromJson( JsonExportPath)`
 The number of classes that support the import/export feature is a rather large one. The following class diagram should help to clarify the associations
 between these classes:
 
-image::ExportClassDiagram.png[]
+image::ExportClassDiagram.png[height=700]
 
 _Figure 1: Class diagram showing the classes directly relevant to importing and exporting_